What is the frequency range for microwave?
Microwave frequencies range between 109 Hz (1 GHz) to 1000 GHz with respective wavelengths of 30 to 0.03 cm.
Why is microwave frequency preferred for communication?
Microwaves are widely used for point-to-point communications because their small wavelength allows conveniently-sized antennas to direct them in narrow beams, which can be pointed directly at the receiving antenna.
How do you build a microwave communication system?
Steps to Design a Microwave Transmission Link
- Determine the route according to the engineering map.
- Select the site of the microwave station.
- Draw the cross-sectional chart of the terrain.
- Calculate the parameters for site construction.
Why do microwave ovens operate at 2.45 GHz?
While most microwave ovens operate at 2.45 GHz, that frequency is not a resonant frequency for the water molecule. Instead, the 2.45 GHz frequency was chosen because it is absorbed weakly enough in liquid water (not free water molecules) that the waves maintain good strength even deep inside a typical piece of food.
What are microwave bands?
The microwave spectrum is usually defined as a range of frequencies ranging from 1 GHz to over 100 GHz. This range has been divided into a number of frequency bands, each represented by a letter. The most common being the IEEE Radar Bands followed by NATO Radio Bands and ITU Bands. …
What are the applications of microwave frequencies?
Microwaves are most commonly used in satellite communications, radar signals, phones, and navigational applications. Other applications where microwaves used are medical treatments, drying materials, and in households for the preparation of food.
Which modulation is used in microwave band?
The most commonly used modulation mode is quadrature phase shift keying (QPSK, also called 4PSK). Multi-level QAM (MQAM) is a modulation mode broadly used in large-capacity digital microwave transmission systems.
How does microwave communication system work?
Microwave is a line-of-sight wireless communication technology that uses high frequency beams of radio waves to provide high speed wireless connections that can send and receive voice, video, and data information.
Which parameters are used for analysis of microwave network?
The basic measurements to determine the S-parameters are familiar and well established microwave measurements: reflection coefficient, attenuation (gain), phase. S-parameters are analytically convenient; they allow for calculations of system performance by cascading the individual components.
How to plan a microwave network?
In the process of planning for the microwave network, appropriate frequency bands and channels should be selected and interference avoidance should also be taken into account. 1. Select proper frequency bands according to the frequency resources (licenses) owned by the carriers and the stipulations of local radio management committees.
How much channel spacing should be required for microwave frequency planning?
Generally, the channel spacing should be at least 2 times of the radio frequency bandwidth. For a greater improvement in the diversity, the channel spacing should be as large as possible. Case study purpose: to be familiar with the preceding rules for microwave frequency planning and apply them to practice.
How to improve the frequency diversity of the microwave link?
When the microwave link is designed to adopt the frequency diversity protection, attention should be paid to the selection of channel spacing between the master channel and diversity channel. The formula to calculate the improvement in the frequency diversity is as follows:
What is microwave training course?
Microwave Training Course, Microwave Radio link planning and frequency management Microwave Training Course presents the state-of-the-art in microwave radio communications. The course presents the basic theory, procedures, and techniques for microwave communication systems an Microwave Radio link planning and frequency management.
